1) You'll get the medal opportunity for this one on the very Southeast of the island (not on the beach). Destroy these three large, dark-colored rockets. Then go to just South east of the motor pool capture point and destroy the final three rockets to achieve this medal.

2) Along the beach on the Southwest, there's a barbed wired fenced-off path to the left, take it and you'll get the medal opportunity. Destroy the red test plane in front of you to achieve the medal. Stealing the enemy tank here is helpful, but regardless, be prepared for a rather strong Axis defense.